Fornia



S. H. PAGE AND J. B. STRUBLE.

CONTROLLING MEANS FOR MOTOR TEMPERATURES.

APPLICATION FILED MAR 2,1921.

1,393,902, Patented Oct. 18, 1921.

UNITED STATES PATENT OFFICE.

STANLEY H. PAGE, OF SAN FRANCISCO, AND JACOB B. STRUBLE, OF OAKLAND, CALI- FORNIA.

CONTROLLING MEANS FOR MOTOR-TEMPERATURES.

Specification of Letters Patent.

Patented Oct. 18, 1921.

Application filed March 2, 1921. Serial No. 449,213.

the United States Serial Numbers 438,518

and 488,519, filed January 19th, 1921.

In the present invention, we prefer to employ a plurality of thermostatic devices positioned within the cooling system and operated by the variations of temperature thereof, and to connect the movable elements of said thermostatic devices with a movable member of a cylinder fluid pressure actuated device, and with a member associated with the cooling system whereby the thermostatic devices cooperate with the cylinder fluid pressure operated device to vary the temperature of the cylinder combustion chamber walls inversely with the power out put of the cylinder.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings, and Set forth in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference is directed to the accompanying drawings, wherein Figure 1 is a broken sectional view of the preferred embodiment of our invention illustrating the thermostatic devices and the cylinder fluid pressure operated device with the movable elements thereof in neutral or nondistended position.

Fig. 2 is a view similar to Fig. 1 illustrating the movable elements of the thermostatic devices distended indicating a high temperature during a period of reduced power output of the engine.

Fig, is a view similar to Figs. 1 and 2 lllust rating a full load on the engine and also illustrating a thermostatic device operatlng in collapsed position due to the lowered temperature of the cooling water.

F g. 4 is a View similar to the others illustratmg the movable elements of both thermostatic devices in distended position, and wlth a partial load on the engine wherein the temperature of the cooling fluid is maintamed at a point between the temperatures that would be maintained by each of the thermostatic devices operating individually.

Referring to the drawings wherein like characters of reference designate corresponding parts, 1 indicates an engine cylinder formed with a jacket 2 and associated with the cylinder and connected with the jacket is a circulating cooling system consisting of the radiator 3 connected at its opposite ends by pipes 4 and 5 with the upper and lower ends of the jacket 2. The circulating system is adapted to contain a fluid such as water and to control the passagev of air through the radiator 3 whereby the temperature of the cooling fluid is lowered, we employ a shutter in advance of the radiator and including a plurality of pivotally mounted slats 6 provided with operating arms 7 pivotally connected to operate in unison by a rod 8. The rod is connected to one arm of the bell crank 9, and from the other arm 10 of said bell crank extends a rod 11 connected with one arm of a bell crank 12.

As in our other constructions illustrated and described in our co-pending applications, we provide a fluid pressure conducting tube 13 communicating at one end with the interior of the combustion chamber of the cylinder and extending a short distance therefrom, the tube having mounted on its end removed from the cylinder a shell 14 formed with an opening 15 in its base of very small area, which pening provides a communication between the interior of the shell and the interior of the cylinder combustion chamber. The upper end of the shell 14 is illustrated as being closed by a flexible diaphragm 16 held in position by a ring 17, and it will be apparent that the fluid pressure within the engine cylinder will exist within the shell 14 and operate the diaphragm 16 in accordance with the power output of the cylinder, a greater pressure existing within the shell 14 when the motor is operating underaheavy load than when the same is operating under a light load.

In the pipe 4 which receives the cylinder wall cooling fluid as it passes from the jacket 2, we mount a plurality of thermostatic devices, illustrated in the present invention as two in number, and each consisting of a shell 18 closed by a movable diaphragm 19, each of which is held in position by a ring 20. These thermostatic devices are adapted to contain a highly volatile fluid such as ether and are designed to operate at different temperatures, the device A being designed to cause an, outward movement of its diaphragm at a temperature of 140 degrees and the device B being designed to cause an outward movement of its diaphragm at a. temperature of 180 degrees. From the diaphragms 19 or the movable elements of said thermostatic devices extend the rods 21 pivotally connected as at 22 with the opposite ends of a suitable link 23 adapted when said diaphragms are in their normal or collapsed position to lie in a plane making an acute angle with that of the center points of the diaphragma, and to lie in a similar plane when both of said diaphragms or movable devices are intheir full distended position.

The thermostatic devices afford a means of opening and closing the shutter and same are connected therewith through a shift lever 24 pivoted to one of the arms of the bell crank 12 and formed in its free end with a portion 25 received within said link 23. To select the. desired thermostatic device to control the operation of the shutter in accordance with the power output of the cylinder, a suitable member 26 is pivotally connected. at one end with the shiftable lever 24 within its length, and at its opposite end connects with one arm of a bell crank 27, from the other arm of which extends a rod 28 connected with the movable element or diaphragm 16 of the shell 14.

Referring to Fig. 1 which illustrates the different elements in position when the engine is started, it will be observed that the diaphragms are in neutral or nondistended positions and the shutter is closed.

After the motor has started and is idling or operating under a light load, the thermostatic device A begins to open on the temperature of the cooling fluid attaining 140 degrees but no action relative to the shutter takes place as the diaphragm 16 associated with the shell 14 remains in its normal position retaining the member 25 in the lower end of the link 23. As the temperature of the cooling fluid continues to rise above 140 degrees, the same operates the thermostat B on arriving at 180 degrees raising the lower end of the link 23 and slightly opening the shutter, as in Fig. 2 of the drawings, which figure illustrates the diaphragms of both thermostatic devices fully distended. If a full or an increased load is placed on the engine, the diaphragm 16 will be distended, and if such load at tains a full load position, the distention of said diaphragm will shift the lever 24 into alinement with the rod 22 associated with the thermostatic device A, which action will cause a further or full opening of the shutter, as in Fig. 3 of the drawings. This opening of the shutter will permit the more rapid cooling of the fluid in the radiator and as the same drops below a temperature of 180 degrees, the movable element or diaphragm l9 of the device B will assume its normal position, but no further action as to the shutter will take place unless the load on the engine is decreased or the temperature of the cooling fluid continues to descend below the 140 degrees, at which time the closing movement of the shutters is effected.

In figure, it will be observed that medium load is on the engine, and that the movable elements of thermostatic devices A and B are distended which co-operation causes a positioning of the end 25 of the shiftable lever 24 at an intermediate position within the link 23 effecting a partial closing of the shutter, and maintaining the temperature of the cooling fluid at a point between 140 and 180 degrees.

Having thus described our invention what we claim as new and desire to secure by Letters Patent of the United States is 1. In combination with the cylinder of an internal combustion motor provided with a water jacket, a circulating water system connected with said jacket, a plurality of thermostatic members within said water system and operated successively by the varying temperatures thereof, a member communicating with the interior of the engine cylinder and operated by a variation of fluid pressure therein, means for controlling the cooling of the water within said system. and a connection between said means and said members, whereby said thermostatic members are selected to operate said cooling means by said pressure operated member in accordance with a variation of the fluid pressure within the cylinder.

2. In combination with the cylinder of an internal combustion motor provided with a water jacket, a circulating 'ater system connected with said jacket, a plurality of the]: mostatic members within said water system and each operating at a different temperature, a member communicating with the interior of the engine cylinder and operated by a variation of fluid pressure therein. means for controlling the cooling of the water within said system, an operating connection between said means and said thermostatic members and a selecting connection between said main connection adjacent said thermostatic members and said pressure actuated member whereby said thermostatic members are selected to operate said cooling means by said pressure operated member in accordance with a variation of the fluid pressure within the cylinder.

3. In combination with an internal combustion engine cylinder provided with a water jacket, a circulating water system connected with said jacket, means for controlling the cooling of the water within said system, a plurality of thermostatic members within said water system and each including a movable rod, said members operating at different temperatures, a link pivotally connecting said rods, an operating connection between said controlling means and said link and including a lever shiftable at one end in said link, a movable pressure actuated member communicating with the interior of the engine cylinder and operated by a varia tion of fluid pressure therein, and a connection between the same and said movable link whereby said lever is operated in said link in accordance with a variation of fluid pressure within the cylinder.

In testimony whereof we have signed our names to this specification.

STANLEY H. PAGE.

JACOB B. STRUBLE. 

